//////////////////////////////////////////////////////////////////////////
//
//  Copyright (c) 2016, Image Engine Design Inc. All rights reserved.
//
//  Redistribution and use in source and binary forms, with or without
//  modification, are permitted provided that the following conditions are
//  met:
//
//      * Redistributions of source code must retain the above
//        copyright notice, this list of conditions and the following
//        disclaimer.
//
//      * Redistributions in binary form must reproduce the above
//        copyright notice, this list of conditions and the following
//        disclaimer in the documentation and/or other materials provided with
//        the distribution.
//
//      * Neither the name of John Haddon nor the names of
//        any other contributors to this software may be used to endorse or
//        promote products derived from this software without specific prior
//        written permission.
//
//  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
//  IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
//  THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
//  PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
//  CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
//  EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
//  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
//  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
//  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
//  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
//  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
//////////////////////////////////////////////////////////////////////////

#include "Gaffer/Monitor.h"

#include "Gaffer/Process.h"

using namespace Gaffer;

Monitor::Monitor()
{
}

Monitor::~Monitor()
{
}

Monitor::Scope::Scope( const MonitorPtr &monitor, bool active )
	:	ThreadState::Scope( (bool)monitor )
{
	if( !m_threadState )
	{
		// We didn't push state because `monitor` was null.
		return;
	}

	m_monitors = *m_threadState->m_monitors;
	if( active )
	{
		m_monitors.insert( monitor );
	}
	else
	{
		m_monitors.erase( monitor );
	}

	m_threadState->m_monitors = &m_monitors;
	initializeMightForce();
}

Monitor::Scope::Scope( const MonitorSet &monitors, bool active )
	:	ThreadState::Scope( !monitors.empty() )
{
	if( !m_threadState )
	{
		// We didn't push state because `monitors` is empty.
		return;
	}

	m_monitors = *m_threadState->m_monitors;
	if( active )
	{
		for( const auto &m : monitors )
		{
			m_monitors.insert( m );
		}
	}
	else
	{
		for( const auto &m : monitors )
		{
			m_monitors.erase( m );
		}
	}

	m_threadState->m_monitors = &m_monitors;
	initializeMightForce();
}

void Monitor::Scope::initializeMightForce()
{
	bool mightForceMonitoring = false;
	for( const auto &m : m_monitors )
	{
		mightForceMonitoring |= m->mightForceMonitoring();
	}
	m_threadState->m_mightForceMonitoring = mightForceMonitoring;
}

Monitor::Scope::~Scope()
{
}

const Monitor::MonitorSet &Monitor::current()
{
	return *ThreadState::current().m_monitors;
}


bool Monitor::mightForceMonitoring()
{
	return false;
}

bool Monitor::forceMonitoring( const Gaffer::Plug *plug, const IECore::InternedString &processType )
{
	return false;
}
